Draft-regulator and ventilator.



JONATHAN W. NOXON, OF VALLEY CITY, N ORTH DAKOTA.

DRAFT-REGULATOR AND VENTILATOR.

VSpecification of Letters Patent.

K Patented Jan. 21, 1908.

Application led Maj 24. 1907. Serial No. 375.436

To all whom tt may concern:

Be it known that I, JONATHAN W. Noxon,

a citizen of the United States, and a resident of Valley City, in the county of Barnes and State of North Dakota, have invented a new and Improved Draft-Regulator andk Ventilator, of which th following is a full, clear, and exact description. j

The ur ose of this invention is to rovide novel etalls of construction for a dra t regulator, which is also adapted for use as a ventilator for inclosedfspaces, is automatic in o eration for either function, and is very simple, practical and sensitive inoperation, so as to work efficiently under varying 'conditions of service.

The invention'consists in theLnovel con-v tion, which similar characters of reference indicate corresponding parts in both figures. Figure l is a partly sectional side View of the improvement in connection with a draft flue, the section bein JV taken on an axial line 1-1 in Fig. 2; and lFig. 2 is a front elevational view, seen in direction 'of the arrow x in Fig. l. A

In the construction shown, that represents a preferred form of the invention, a body or shell is provided, consisting c apreferably plate metal structure that is substantially spheroidal, but has flattened sides. For convenience in manufacture, the shell of the device is formed in two sections 5, 6, that are essentially concavo-convex, have similar dimensions, and are joined together preferably by a tongue aformed on the circumferential, edge of one section 6, which is embeddedin a channel formed in the periphery of the otherv section 5by return-bending the plate metal material, so as to produce a hook-joint aj which, when subjected vto proper compression, secures the edges 4of the sections firmly together. A preferably circular-edged opening t is produced centrally in the flat side of each section 5,6, and onthe peripheral edges ofthese o enings that have equal diameter,

like seats bzjare formed, that are disposed op osite each other..

n the ap lication of the improvement as a draft-regu at'or, it may be connectedwith l an upright flue, such as A, by placing it in a T-porton of a draft-pipe for a stove or furnace, not shown. To facilitate the connection of the shell or body 5, 6 with either the v AT-member of a draft-pipe or n ith the drafttherefrom, saidhollow extension in the present application of the device being slid into a sleeve A that is a lining for a pipe hole in the side wall of the fiue A, as appears 1n Fig. 1.

`A damper is an essential detail of the device, and for the purpose of rendering itlight as well as quite rigid, t e damper is preferably made in two hal sections from plate metal, these similar sections 7 7, being concavoconvex and joined together at their peripherall edges c, which are flattened lto form annular bearing surfaces thereon, for

a seated engagement with ther seats b, b2 as the op eration of the device may render necessary.

perforations are formed, that receive a bolt 8, upon the projecting ends of which perforated endsof two similar hanger bars 9, 9, are mounted and clamped by means of a nut on the end of saidbolt 8.

Above the opening I), in each shell section 5, 6, an arm is secured, said arms 10, 10a, that `are disposed horizontally, being mounted so that the arm 10 projects outward from the shell section 5 and lthe other one from Y the section' 6 into the extension 6a;

n `Upon the outer ends of the arms' 10, 10a, the upper ends of`elongated link plates 11, 12, are respectively hinged, as shown at d,

d', in-Fig.` 1, the 'lower ends of said link plates having hinged connection with the hanger bars 9,' 9, and it will be. seen that the latter are so bent outward and downward, that the link plates iwill hang vertical and parallel with each other, when the damper 7, 7, is `positioned centrally between the draft openingst, t.

l It will'be noticed that the upper end por tion ofthe link plate 11 is offset as at c in Fig. 1, and that a joint leaf 11a is secured upon said offset upper portion, said leaf being jointed upon the arm 10 at d, as before stated, and above this hinge joint, the link plate 11 is extended for engagement with a carrier rod 13. A n upwardly extending ear g is formed or secured on the arm l0, and

upon said ear one end of the carrier rod 13 1*" is pivoted, as indicated at g in Fig. 1. The rod 13 is preferably cylindrical in the body,

and rojects loosely through a central perforation inthe link plate 11, which is so ypositioned that the carrier rod is maintained in a level, condition. The main portion of the rod 13 extends forward from the link plate 11 and a coiled spring 14 is mounted thereon, one end of said s ring being seated against the top end of4 t e link plate, and the'opposite end pressed upon by an adjustable nut h, that is screwed upon the threaded outer end of the carrier rod.

It Will be seen that as the pressure of the spring 14 upon the link plate 11 is above the pivot d, a compressing adjustment of the nut h will rock the lower end of the link plate' outward and draw the damper toward said i link plate.

The peculiar construction and relative arrangement of the details that have been descri ed, serves to move the damper 7 in a plane parallel with that of the joint seat b', and if 'from any cause the damper closely approaches said seat, the annular flat eriphseal the approached opening eral flange on the dam er body' wil have contact with said seat E aid hermetically Upon the arin 10,' a buffer limb'l 10b. is pivotally mounted, which is bent at a right angle so as to project one member toward and near the link plate 11, the freeendof the buffer limb having an elastic cushion thereon, as shown at i, the Ause of which will be described.

In application of the improvement as a draft regulator, assuming that it is in position in a draft pipe leading from a stove or furnace and in lateral. connection with a draft flue, such as A, the damper 7 is adjusted by *pressure of the spring 14, 'so as to be gently closed against the seat b', this adjustment being made when the draft of the chimney or draft flue is normal, by turnin the ,nut if ,in 'a .proper direction.

exhausting `power of the chimney, or flue is increased from an, `cause,\such as variable -Wind currents or a terationsof temperature,

the damper 7 willbe moved from the seat b',

parallel thereto, in a degree roportioned to-the chan e of draft, until t e' damper is disposed mi way between the openin s b, 1)

. which will permit .air to pass into the's ell of ,the device and through it into the draft flue,

Without passingthrough the fire in the stove r furnace. l v

'It Will be seen that the variationsin draft of the chimney or flue Willbe exactly cornpensated for from normal conditions up to maximum force or pull of the draft, and a predetermined degree of draft may be maintained; as when the draft decreases, the

damper 7 will close toward the seat b automatically, due to the tension of the spring14' rocking the link plate 1 1.

When the device is used as a draft regula-lA tor, the buer limb 101D isturned into the.,

Now, if t e draft or position shown in Fig.- 1 and is thus disposed for contact with the link plate 11 when the damper 7 is Ipositioned equally distantfrom the seats b, of the openings b, b, this being a full openin for the damper, which will be changed by a terations of draft foreeas here inbefore explained. g

When the apparatusis employed forventilation of a room or other enclosed space, it is placed inl an opening in a ventilating flue or chimney so that the inlet b, that is nearest the depending link plate 11, is open to the room which is to be ventilated.

The buffer limb 10b' is turned so that its lower portion is removed from the de ending link plate 11 sufliciently to have c earance'- therefrom, and thus said link is permitted to have a free movement toward the shell or casing of the device.

The tensionof the spring 14 is reduced so that thedarnpe 7^'han'gscentrally within the shell, as sho'wnxin Fig. 1,\this adjustment being correct when the draft through the veny tilator flue is normal.

If from any cause, the exhausting oWer of i the ventilator flue is increased, the amper 7 will be drawn nearer to the seat b2, which will proportionately close the lateral opening of the shell into the ventilator flue, as'the draft` When the force .of the latter increases.

draft ofthe flue decreases; vthe damper 7 willV be drawn back toward thev center of the shell,

`by the tension of the spring 14, in exact roportion to the variation in draft power vo air ,current in the ventilating flue, thus at all times maintaining a normal draft' for removal of vitiated air from the room. Should the draft in the ventilating flue become reversed, as sometimes occurs upon opening a door or `window out of the room, and foul air from some other room be drawn thereinto, the damper 7 beingfree, will instantly move in direction of the seat b and close the opening that is Within the room. This will occur upon a reversal of draft 'through the shell 5, 6. The damper 7 will remain closed while the draft is'reversed, but when the exhausting power ofthe ventilating flue becomes normal, said damper will resume a normal central position in the shell, as shown in Fig. 1, which willv permit the resumption of proper ventilation automatically. It will thus be' seen that the improved apparatus will exclude foul air` from a room, and when draft in the ventilating iiue becomes normal, will immediately open its damtr automatically for pro er ventilation of it is in irect communication with.

e inclosed space y The oints b', b2, are preferably covered With as estos or felt cloth, thus forming plie able non-combustible jointsfor a contact of the damper 7I therewith in a noiseless manner.

It is claimed for this apparatus, that the 25 centrally 'seats in the Ventilating openings l), b, in the case er shell 5, 6, is a feature which is novel and very advantageous, in, that it reduces instantly and exactly regulated and ventilation be rendered uniform; the .operation in either capacity bein effected without the slightest change in t e construction of the apparatus. While it is preferred to give the i' shell or casing of the apparatus a circular fis.

bodying a shell or casing having oppositev form, it is obvious that it may be angular in contour and operate efficiently; hence, I do 'not wish to be' confined to the exact shapes of details shown and described, claiming the right to vary therefrom within the scope of the claimsj Having 4thus described my invention,l I

claim as iie`w and desireto secure by Letters Patent:

-1. Adraft regulator and ventilator, em-

` openings therein, 'a damper for closing either hanging the damper so that it may inove` A,seats around their edges, a damper adapted and means for hanging lthe damper in the shell so that it may move in parallel planes.

openinoi 2. A draft regulator and ventilator, em-y i. bodying a shell havingpposite lateral open-f ings therein, a matingy dainper for closing either opening, links and' parallel bars for toward either opening, and means for controlling thetravel of tthe,y damper.

3. 'A draft regulator andv ventilator, embodying a vshell having opposite lateral open.- ings therein, said openings having damper to Vlit tight on either seat, and spring-controlled means for hanging the damper in theshell so that it may move toward either seat by force of air draft currents. l i

I4. A draft regulator and ventilator, embodying a shell having bulged sides, and central openings in said sides, a damper mating said openings andadapted to close either one, means for hanging the `damper-in the shell so that it may move in, planes parallel with the edges of the openings, and means for controlling said movement.y l v A. draft regulator and ventilator,- embodying a shell having bulged sides and circular openings centrally in saidy sides, a damper having' convex sides and a peripheral flange thereon, means forhanging the damper in'the shell so 1t may move toward Ving from. each side of the she the defining edge of eitherppening, and a lateral hollow flanged extension on one sidel of the shell.

6.`A draft regulator and ventilator, embodyinga shell having similarly bulged sides, said 'sides having central circular openings therein and damper seats on the defining edges of said openings, a hanger bar projectdl downwardly, arms on the sides ofthe shell above the openings therein, link plates hinged on the arms and also on the ends of the hanger bars,

-wh'ereby the damper is hung from the shell and adapted for movement inparallel planes toward orfrom either 4opening in the shell,

and a flanged extension on one sidev of the shell. l

7. The combination with -a draft flue having a lateral opening therein, of a draft regulator and ventilator embodying a shell having bulged sides, said sides having central openings therein, a hollow damper having conveXed sides and a flanged edgethat may seat on the edge of either opening, spring controlled meansfor hanging said damper centrally in the shell and\perrnitting it to move ,toward either opening and engage its flanged edge with the peripheral edge' on 'either opening, and a flanged hollow extension on one side of the shell, adapted to fit l in the .opening in the wall of the 'draft flue.

I8. A draft regulator anch-ventilator, em-` bodying a circular shell, having bulged sides and central circular openings in said sides formed with`peripheral seats, a hollow damper having convexled sides and a flanged edge, a central bolt in the damper, two hanger arms depending fromthe ends of the bolt, two arms projected o positely from the shell above the openings tll hinged on the'ends of said upper arms and jointed at their lower ends upon the ends of the hanger bars, a supported carrier rod passing through the extended upper end of one of said link plates, a coiled spring on said rod,

van adjusting nut on the outer end of said rod for contact with the spring, and a buer limb adapted to receive the impact of the link plate that is pressed on by the spring.

In testimony whereof I have signed my naineto this A'specification in the presence of two rsubscribing witnesses. y j JONATHAN W. NOXON. Witnesses: Y

W. W. Sis'iiTi-r, W. F. DU VALL.

erein, link plates l 

